Improvement in methods of autographic printing



i i To all whom itmny concern:

PATENT OFFICE.-

' JOSIAH PUMPHR EY, OF BIRMINGHAM, ENGLAND.

IMPROVEMENT INIMETHODS OF AUTOGRAPH IC PRINTING.

Specification formingpart of Letters Patent No. 200,759, dated February 26, 1878; application filed June 15, 1877. I

Be it known that I, JOSIAH PU V BirminghamgEngland, have invented certain new and useful Methods of Autographic Print ing, which improvements are fullyset forth in thefollowing specification.

This invention relatesto the production and multiplication of copies of writings or drawings by means of autographic printing.

writingor drawing is made or'produced by means of an ink: (of the description hereinat ter mentioned) having special properties as to divisibilitmto non-liability to run or'spread,

inthe presence ofmoisture, and to the permeation of the papergor surface written on. This peculiar. ink is compounded by dissolvin g aniline crystals (of the'color the ink is required) in acetic acid, and adding thereto a The writingor drawing having been produced upon ordinary thin writingor drawing paperwith thisyink,. when dry the paper is placedwith its inked surface downward on a plate of zinc, or other material'impervious to I water and having a zhard,smoothsurface.

Thesheet of paperupon whichit isdesirfed to print is thenevenly dampened and laid upon the backof ,the'drawing or written sheet,

i and on topof allis laid a sheet of oil-paper or a other water-proof. material. The plate and and reproduces thereon a counterpart or copy .ofthe original. This copy is then removed and a fresh sheet; of bpaper substituted, and

t the same operations are continuously repeated until the ink from the original writing or drawing is exhausted or ceases to give perfect I v 7 tle under pressure, and I write with the above- According to this invention, the original described ink thereupon, using a glass or other tube, .or any suitable vehicle for conveying the ink, pressing therewith sufficiently to rupture the surface of the paper in the direction of the lines of the writing, drawing, or other device. I then proceed with the duplication or copying' thereof, as above described, and when the ink is about exhausted, or in aid of its replenishment, I-supply fresh color by means of a pad.

a The advantages derived from the adoption of these improvements, as compared with other processes of autographic printing, consist in simplicity of operation, economy of printingcolor, and increased production or number of copies, and economy of time, as there are no intermediate operations necessary between writing the original and printing the copies.

I claim as my invention The method of autographic printing herein described, the same consisting in writing or drawing upon a sheet of papeiywhich, when dry, is placed face inward upon a plate impervious to water, then covered by a dampened sheet of paper, which is backed with a sheet of water-proof material, and the whole subjected to pressure.

, JOSIAH PUMPHREY. Witnesses:

JOHN 'KENnRIcK, J. BRAME. 

